I didn't report bug, because I have no time to bisect it, no usable info to report.
3.7.x has another bugs, under vmware 9 with over 4G RAM guest, eval acpi method take long delay. I bisect it to the RCU part, then no result, too many unstable RCU changes in 3.7-rc1.

According to this information it seems that only my computers AHCI implementation (the AHCI controller or, like, its firmware or whatever) does not support aggressive device sleep – the disks themselves are just fine.